Azuma Yachiho
If you like older sisters who are really full of themselves but also have a soft side, Azuma Yachiho from Mato Seihei no Slave will ruin you. As the elite Vice Captain of the 6th Anti Demon Squadron, she always steals the show when she shows up. She is Himari's brilliant older sister. She loves to tease her little sister, of course. But behind that very arrogant and self-assured face is a family member who really cares. She quickly gets caught up in the crazy harem dynamics around our main character Yuuki, which causes a lot of time manipulation chaos on the battlefield.
Yachiho looks like a goddess. She has beautiful long lavender hair, sharp, confident eyes, and a modified military uniform that shows off her beautiful, mature figure perfectly. She can literally freeze time in battle with her overpowered Golden Hour ability. But let us be honest about why so many fans love her. When Yachiho finally borrows Yuuki to fight, she has to pay the price using the well-known ecchi reward system. It is perfect waifu material to see this very smug senpai turn into a blushing, panicking mess all of a sudden. Fans can not get enough of her hot time stop antics and very suggestive reward scenes.
Yachiho's beautiful design makes her the queen of the fanart world. Her wallpaper galleries are full of amazing ecchi drawings of her most famous reward moments. There are also a lot of amazing action art pieces that show off her confident smirk while she freezes demons in their tracks. Yachiho art always has great visuals, whether you want a cool combat background or some really cultured fanservice for your desktop.